That's a whole 50% off
(Tokens aren't cards.) Zone of Flame's last ability only triggers once for each instance where cards are put into or removed from the enchanted zone, no matter how many cards were put into or taken out of that zone at the same time
Your companion is not one of your 100 cards
If people play Sisay a bit more, it could see some upside
Of course, many Pokedex entries allude to the fact that Phantumps are the souls of dead children possessing tree stumps, so maybe it has something to do with that
Any damage taken by the Planeswalker character will take some amount of real time to regenerate, such that a player cannot immediately challenge an opponent after a defeat, though the player can use a healing potion, which replenishes over time, to fully heal the character, or can switch to a different Planeswalker to use